Uses “Labels” appended to packets (IP packets, AAL5 frames) for transport of data
MPLS packets can run on other layer 2 technologies such as ATM, FR, PPP, POS, Ethernet
Other layer 2 technologies can be run over an MPLS network
Labels can be used as designators. For example—IP prefixes, ATM VC, or a bandwidth guaranteed path
MPLS is a technology for delivery of IP Services
Allow Core routers/networking devices to switch packets based some simplified header
Provide a highly scalable mechanism that was topology driven rather than flow driven
Leverage hardware so that simple forwarding paradigm can be used
Hardware became better and looking up longest best match was no longer an issue
By associating Labels with prefixes, groups of sites or bandwidth paths or light paths new services such as MPLS VPNs and Traffic engineering, GMPLS were now possible
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